Mehrparameterkorrelationen zur quantifizierung der kationischen copolymerisation von styrol und <i>p</i>‐substituierten styrolen

Heublein, G.; Wondraczek, Reinhard H.

doi:10.1002/macp.1977.021780625

Cited by 12 publications

(3 citation statements)

References 20 publications

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“…Over the past few decades numerous researchers reported on the formation and physicochemical properties of poly(4-bromostyrene) (PBrS) and its copolymers. These studies have been motivated by excellent flame-retarding properties − and unique phase behavior of PBrS. − A variety of synthetic methodologies for obtaining homopolymers and copolymers of bromostyrene have been described, including free radical, , cationic, , anionic, and controlled radical polymerization . In addition, the synthesis of random copolymers, poly(styrene- co -4-bromostyrene) (PBr x S), comprising styrene and 4-bromostyrene units, has been reported that utilized bromination reaction performed on parent polystyrene (PS) coils. − The latter reaction has several advantages.…”

Section: Introductionmentioning

confidence: 99%

“…These studies have been motivated by excellent flame-retarding properties [1][2][3][4] and unique phase behavior of PBrS. [5][6][7][8][9][10][11][12][13][14][15][16] A variety of synthetic methodologies for obtaining homopolymers and copolymers of bromostyrene have been described, including free radical, 17,18 cationic, 19,20 anionic, 21 and controlled radical polymerization. 22 In addition, the synthesis of random copolymers, poly(styrene-co-4-bromostyrene) (PBr x S), comprising styrene and 4-bromostyrene units, has been reported that utilized bromination reaction performed on parent polystyrene (PS) coils.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Solvent Quality and Chain Confinement on the Kinetics of Polystyrene Bromination

2008

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We report on the kinetics of the bromination of free polystyrene (PS) chains in bulk solution and those anchored on flat solid substrates by performing the bromination reaction in different solvents, including nitrobenzene (NB), 1-chlorodecane (CD), 1-chloroundecane (CUD), and 1-chlorododecane (CDD), at various temperatures. We find that bulk bromination of PS follows the second-order kinetic in bromine and the reaction rate increases with increasing dielectric constant of the solvent (ε). In spite of ε CDD > ε CD , the bulk bromination kinetics of PS in CDD is slower than that in CD because of lower solubility of PS in CDD than in CD. In addition, we demonstrate that the reaction rates for brominating PS brushes anchored to flat solid substrates are much slower than those for brominating free PS chains in bulk solution. We attribute this behavior to steric hindrance due to PS confinement on the substrate.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Solvent Quality and Chain Confinement on the Kinetics of Polystyrene Bromination

2008

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“…on. Although many papers on a variety of synthetic methods for yielding homo-and copolymers of ClSt, including radical, 12 cationic 13,14 and an-Chlorostyrene (ClSt) and its polymer are among ionic polymerizations 15 have been released, these the most important compounds that act as precurmethods are not suitable for obtaining poly(ClSt) sors for a number of compounds with such signifiwith a highly controlled molecular weight. Living cant functional groups which are prepared with a Grignard reagent of ClSt.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of well‐defined polychlorostyrenes by living radical polymerization with 4‐methoxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl

Yoshida

Fujii

1997

J. Polym. Sci. A Polym. Chem.

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Radical polymerization of 2-, 3-, and 4-chlorostyrenes (ClSts) was investigated with benzoyl peroxide (BPO) as an initiator, in the presence of 4-methoxy-2,2,6,6-tetramethylpiperidine-1-oxyl (MTEMPO). The polymerization was performed in bulk for 3.5 h at 95ЊC and then continued for a defined time at 125ЊC to give the corresponding poly(ClSt)s with narrow polydispersity in high yield. It was found that the polymerization proceeded in accordance with a living mechanism in all cases, because the molecular weight of the resulting polymers was proportional to the conversion, and inversely proportional to the initial concentration of MTEMPO. Furthermore, the polymers obtained from 2-and 3-ClSts quantitatively act as initiators for the polymerization in the living radical manner, of styrene to give the corresponding block copolymers, except for poly(4-ClSt). The thermal stability of the living poly(ClSt)s was found to decrease in the order of 2-ú 3-ú 4-ClSt on the basis of the results of their postpolymerizations.

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Zur Korrelationsanalyse mit Hilfe nichtlinearer Parameterfunktionen in der kationischen Homo‐ und Copolymerisation

1979

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Bei Untersuchungen des Zusammenhanges zwischen sog. Ziel-, EinfluB-und SteuergroBen der kationischen Polymerisation p-substituierter Styrole wurden mehrfach nichtlineare graphische Bcziehungen gefunden. Diese Beziehungen lassen sich durch Transformation der EinfluB-und SteuergroBen in nichtlineare Parameterfunktionen und anschlie-Bende lineare Regressionsanalyse quantifizieren. Ein mathematisches Verfahren dazu wird vorgeschlagen. Die Methodik zur Quantifizierung von Struktur-Wirkungs-Beziehungen mit Hilfc der Korrelationsanalyse 1aBt sich auf ahnlichc Problemstellungen ubertragen. Ic xoppensyuonno&y axwuay npoyeccos xamuonnoii eofiou cononwepuaayuu c npuwenenuea nenuneiinbax $ynzyuii napafiempoe B P a M K a X HCCJIeAOBaHHm B3aHMOCBR3H MeHEAY TaK Ha3bIBaeMbIMH qeJIeBbIMI4, BJIEzHIoWEzMH Ez peryJIHpyeMbIMH Ilapa-B J I H F I I O I~~X II perynHpyeMbIx napaMeTpoB B HenmeiHbre ( P Y H K~E~H H n o c n e~y~o~e r o nHHemHoro perpeccHoaaoro aHaJIH3a.pelueHHR ApJTHX aHaJIOrEzqHbIX n p o 6 n e~. Correlation analysis of the cationic homo-and copolymerization by non-linear parameter functionsNon-linear relations between the so-called aim values, influence parameters as well as regulating parameters arc often found in cationic polymerization. These relations can be described quantitatively by transforming the influence resp. regulating parameters into non-linear parameter functions and subsequent linear regression analysis. The mathematical procedure is given. This method can also be applied to similar problems.

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Mehrparameterkorrelationen zur quantifizierung der kationischen copolymerisation von styrol und p‐substituierten styrolen

Cited by 12 publications

References 20 publications

Effect of Solvent Quality and Chain Confinement on the Kinetics of Polystyrene Bromination

Effect of Solvent Quality and Chain Confinement on the Kinetics of Polystyrene Bromination

Synthesis of well‐defined polychlorostyrenes by living radical polymerization with 4‐methoxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl

Zur Korrelationsanalyse mit Hilfe nichtlinearer Parameterfunktionen in der kationischen Homo‐ und Copolymerisation

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